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Peter Bloch
Приєднався 9 жов 2011
Phases of the Moon
Why only one side is visible; how the 8 phases occur; meaning of waxing, waning and crescent moon; eathshine;
0:00 Why only 1 side of moon is visible
48:07 Four quarter moons
5:22 Crescent moons
6:55 Earthshine
7:25 Orbital tilt causes fewer eclipses
8:13 Quiz
0:00 Why only 1 side of moon is visible
48:07 Four quarter moons
5:22 Crescent moons
6:55 Earthshine
7:25 Orbital tilt causes fewer eclipses
8:13 Quiz
Переглядів: 43
Відео
Add Chapters to Video
Переглядів 242 роки тому
Shows step by step method. Points to a misleading template for time stamp.
Chemical Change
Переглядів 212 роки тому
Backgrounder that defines chemical change with many examples; variable speeds; 4 clues for changes; concept of reversibility 0:00 Definition of chemical change 1:58 Speeds of chemical change 4:23 Deciding whether it's physical or chemical 11:54 Summary of 4 clues 12:18 Reversibility
Source of Energy
Переглядів 92 роки тому
Designed for elementary school teachers. Shows how Sun's energy is the ultimate source for wind, coal, oil, hydroelectric power.
Physical Changes
Переглядів 202 роки тому
Designed for elementary school teachers. Explains, with examples, changes based on changes in state and changes in form. Discusses criterion of reversibility. 0:00 Introduction 00:26 Definition of physical change 00:46 Changes in form 1:57 Changes in state 7:50 Reversibility 10:50 Popping corn
Changes in State
Переглядів 82 роки тому
Designed for elementary school teachers. Discusses all 6 changes with many examples. Includes distinction between freezing-solidification and vapour-gas. 00:00 Introduction 00:23 Changes in State 2:00 Sublimation 6:35 Freezing vs Solidification 9:02 Vapour vs Gas
Gases - some properties
Переглядів 32 роки тому
Designed for elementary school teachers. Discusses 5 properties: shape, volume, fluidity, compressibility, sensitivity to heat.
Liquids - some properties
Переглядів 62 роки тому
Designed for elementary school teachers. discusses 5 properties: volume. shape, fluidity, compressibility, sensitivity to temperature.
Solids - some properties
Переглядів 132 роки тому
Designed for elementary school teachers. Introduces solids that are rigid, soft and semi-solid. Selects 4 properties to discuss.
Jointing Mortar Between Flagstones
Переглядів 84 тис.2 роки тому
This product from Romex Canada was successfully applied to the large gaps between our flagstones.The video shows 2 ways of applying the mortar, resurfacing one area, waterproofing the surface. 0:00 Introduction 0:46 Original pathway 1:06 Jointing mortar details 2:16 Describing preliminary prep. 3:41 Starting the process 5:30 Using a trowel 6:09 Comparing original and final 6:47 Prepare your own...
Rocks & Minerals Pt 2
Переглядів 243 роки тому
Description, explanation and classification of minerals, the building blocks of rocks. Classification and examples of rocks. 0:00 Introduction 0:13 Minerals definition & examples 1:14 Mineral uses & characteristics 2:50 Formulas of minerals 3:28 Silicate structures 3:50 Summary 4:05 8-group classification 6:02 Minerals form rocks 6:40 Rocks 10:05 Metamorphism 10:50 Quiz
Structures Pt 2
Переглядів 1093 роки тому
Explains, with examples, how strength and stability play important roles in structures.
Structures Pt 1
Переглядів 7283 роки тому
Describes, with examples, 3 types of structures: frame, solid, shell. 0:00 Introduction 0:36 Frame, Solid and Shell Structures 3:11 Summary 3:42 Bill Nye on structures 4:31 Quiz
The Tides
Переглядів 73 роки тому
Explains the effect of the Moon and Sun on tides. 0:00 Introduction 0:17 Two examples of tides 1:12 Moon's effect on Earth 3:14 Sun's effect on Earth 5:32 Tidal Range 6:19 Why tides on opposite sides of Earth are equal 9:34 Tide vs Tsunami 11:37 Tidal Bore 12:28 Red Tide 12:44 Rip Tide 13:09 Rip Current 14:21 Summary
Solstice Dates Variation
Переглядів 183 роки тому
Shows how dates of summer and winter solstice have changed over the centuries with explanation.
Greatest Common Factor, Least Common Multiple
Переглядів 103 роки тому
Greatest Common Factor, Least Common Multiple
El.ranchero Work Construccion Estone like
El.ranchero Work Construccion Estone like♡
El.ranchero Work Construccion Piedra like
El.ranchero Work Construccion Piedra like
ua-cam.com/video/m5ePnEGafN8/v-deo.htmlfeature=shared
Thank you!
What kind of monster reads and follows directions to a T???
$100 to buy a bucket of premixed flag grout that will only do 5 minutes of grouting. You’re better off buying the bags and premixing yourself (1 part type S, 3 or 4 parts sand)
A potentiometer acting like a rheostat is not the best solution in the case of DC motors. For this reason, the first version of a magnetic stirrer was not able to operate at low speeds. The easiest solution is to replace the potentiometer with either a PWM board or a 'true' voltage regulator board. The video was posted 5 years ago and my comment is a bit late. Nevertheless, I hope that it will be useful to someone.
yayyyy cobalt chloride 🥳
You must have some money pal how much did that set you back way above my pay grade that’s for sure nice job all the same
Usually your don't dip the brush into the can of poly, put a little in a cup, helps prevent trash and dust from getting in the van. Mortar removed by sweeping? That is not good. Perhaps the product is less than ideal for this application.
That's a lot of plastic for a bag of mortar. Different colors? That's not good. Your storage technique sounds problematic. Hope that stuff was made by windmills.
Amazing contnet5
Hope it holds up for you through freezing and thawing cycles. Permeability may be good in some applications, not in others.
Not sure if you're referring to the jointing mortar or the polyurethane surface. In the former case, all is well after the first winter just passed. In the latter case, there was some pooling of water at one end during a heavy rain but the rest was OK.
@@peterbloch5590 did you fill in where it was pooling with another layer of mortar mix to stop the pooling?
I’m contemplating on doing this to 4 year old field stone patio for a client. I’m confident that it’s probably settled to where it needs to be. But I’m nervous of thaw and freeze. Do you recommend an alternative. Polymeric won’t work as the gaps in stone are about 4-6 inches in some places
@@tomdavis728 ua-cam.com/video/PV-2bdrtFEw/v-deo.html
I used rompox in the spring of 2023. It did not hold up in the winter. I will repair with concrete.
Polyurethane doesn’t sound like a good idea at all
Thanks
Really clear explanation of the experiment, thanks a lot sir
Brilliant! If you are measuring from the South Pole on the December solstice, what formula should be used?
Good question since I did not deal with the southern hemisphere. Finding tilt at your winter solstice (June) is T = L - Iws where your latitude L is a positive number. Finding tilt at your summer solstice (December) is T = L - Iss Finding tilt at your autumn equinox is T = L - Iws; or if you measure your latitude, Iae, then T = Iae - Iws. If you use the summer and winter solstices, then T = (Iss - Iws)/2 . The angle of incidence is greater at your summer solstice than at your winter solstice.
Please refer which book we have read to know all this measuring formula
Bravo , What an effective and genius measure methods , love it so much
Glad you like it!
Very helpful 👍🏻
Glad it was helpful!
Let's go! How long have You Been at it? see ya xd
Please remember me at 20 subscribers. I Wish this was longer! See ya Bud :O
Salvaged cheap builders grade bathroom fans are a good source of shaded pole motors.